As a 20-year-old pitching for Low-A Quad Cities, Herron was 10-7 with a 3.74 ERA and 1.085 WHIP last year. His best quality is his command, as he struck out 130 and walked just 26 in 137.1 innings. He'll likely get a crack at Double-A this year, and Cardinals fans may be calling for him at midseason if he keeps this up.